Convergence issue with Euler_Explicit time stepping.!!!

Vino · December 15, 2014, 07:42

Hi,
I just tried inviscid flow over cylinder(Incompressible) with EULER_EXPLICIT time stepping and 2ND_ORDER_LIMITER. It is not converging and leading to unphysical results. But with EULER_IMPLICIT the results are fine. I would like to know whether its a bug in the solver itself. Please follow the following links for the config and grid files which I used.

Config_file

Grid_file

fpalacios · January 1, 2015, 20:24

Have you tried to reduce the CFL number with the explicit formulation?

Best Regards,

Francisco Palacios
SU2 lead developer

Vino · January 27, 2015, 15:27

Thanks for you reply.

Yes.! I have tried Explicit Euler-stepping and RK-stepping with CFL number as low as 0.5. Still the problem exists.

December 15, 2014, 07:42	Convergence issue with Euler_Explicit time stepping.!!!	#1
Vino Senior Member Vino Join Date: Mar 2013 Posts: 130 Rep Power: 13	Hi, I just tried inviscid flow over cylinder(Incompressible) with EULER_EXPLICIT time stepping and 2ND_ORDER_LIMITER. It is not converging and leading to unphysical results. But with EULER_IMPLICIT the results are fine. I would like to know whether its a bug in the solver itself. Please follow the following links for the config and grid files which I used. Config_file Grid_file

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
problem with Min/max rho	tH3f0rC3	OpenFOAM	8	July 31, 2019 10:48
[solidMechanics] solidMechanics gear contact in rotation	nlc	OpenFOAM CC Toolkits for Fluid-Structure Interaction	3	January 11, 2015 07:41
Sudden jump in Courant number	NJG	OpenFOAM Running, Solving & CFD	7	May 15, 2014 14:52
AMI interDyMFoam for mixer nu problem	danny123	OpenFOAM Programming & Development	8	September 6, 2013 03:34
pisoFoam with k-epsilon turb blows up - Some questions	Heroic	OpenFOAM Running, Solving & CFD	26	December 17, 2012 04:34

January 1, 2015, 20:24		#2
fpalacios Super Moderator Francisco Palacios Join Date: Jan 2013 Location: Long Beach, CA Posts: 404 Rep Power: 15	Have you tried to reduce the CFL number with the explicit formulation? Best Regards, Francisco Palacios SU2 lead developer

January 27, 2015, 15:27		#3
Vino Senior Member Vino Join Date: Mar 2013 Posts: 130 Rep Power: 13	Thanks for you reply. Yes.! I have tried Explicit Euler-stepping and RK-stepping with CFL number as low as 0.5. Still the problem exists.